KR101918026B1 - Method and apparatus for supporting multiple frequency assignment in wireless communication system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for supporting multi-frequency allocation in a wireless communication system, and a terminal operation method for supporting multi-frequency assignment (FA) in a wireless communication system, , Determining an overlay mode and receiving configuration information for all FAs from a base station through a broadcast channel, determining at least one FA index for the overlay mode, Searching for configuration information corresponding to at least one FA index for the overlay mode using configuration information for all FAs received through the broadcast channel, advantageously enabling efficient transmission and reception of large amounts of data .

Overlay mode, frequency assignment, configuration information, broadcast messages.

Description

[0001] METHOD AND APPARATUS FOR SUPPORTING MULTIPLE FREQUENCY ASSIGNMENT IN WIRELESS COMMUNICATION SYSTEM [0002]

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for processing multi-frequency assignment (FA) configuration information to support an overlay mode.

As the wireless communication system is developed, the types of services and traffic amount to be provided in the wireless communication system are increasing. In order to satisfy such a demand, many wireless communication technologies have been proposed. Among them, Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) Is currently being studied as the most promising next generation wireless communication technology. The Institute of Electrical and Electronics Engineers (IEEE) 802.16 family of wireless metropolitan area networks (WMAN) also adopts OFDM or OFDMA technology as a standard.

On the other hand, since frequency resources are limited in the wireless communication system, usable frequency bands are also limited. The wireless communication system is evolving by changing the specifications and so on, servicing high-speed data compared to existing systems or solving old problems. In this evolution, various systems can coexist in the same area depending on the degree of compatibility with existing systems.

1 is a diagram schematically illustrating a structure for supporting a single frequency band and a structure for supporting two frequency bands in a conventional wireless communication system.

1, a base station (BS) in a wireless communication system, particularly a broadband wireless communication system represented by IEEE 802.16, includes one frequency assignment (FA) or two or more FAs . The base station provides a wireless channel to a mobile station (MS) through an FA that it operates.

Referring to FIG. 1, the mobile station 100 is located in the FA1 area 120 and can move to the FA2 area 140 (referred to as inter-FA handover). Herein, the FA1 area 120 refers to a service area in which the mobile station 100 provides a wireless communication service using FA1, and the FA2 area 140 indicates that the mobile station 100 uses a FA2 Is a service area in which a service is provided. In this case, if the mobile station 100 located in the FA1 area 120 can operate only one FA, or if FA1 and FA2 are operated by different base stations, the mobile station 100 performs handover between FAs And FA2 is used to provide the wireless channel.

Alternatively, if the mobile station 150 is capable of operating at least two FAs or if at least two FAs are being operated by one base station, the mobile station 150 transmits the FA1 region 160 and the FA2 region to the FA_n 180, respectively. As described above, the mobile station and the base station can transmit and receive high-speed and large-capacity data using a plurality of FAs FA_1 to FA_n. Hereinafter, a technique using a plurality of conventional FAs without assigning a new frequency band is referred to as a frequency overlay. However, in a wireless communication system, information about all FAs supporting frequency overlays (e.g., center frequency of FA, bandwidth of FA, offset of FA, etc.) should be shared.

Therefore, there is a need for a method and apparatus for efficiently processing configuration information for a plurality of FAs supporting frequency overlay in a wireless communication system.

It is an object of the present invention to provide a method and apparatus for supporting frequency overlays in a wireless communication system.

It is another object of the present invention to provide a method and apparatus for efficiently processing configuration information for a plurality of FAs supporting frequency overlay in a wireless communication system.

According to a first aspect of the present invention, there is provided a terminal operation method for supporting multiple frequency assignment (FA) in a wireless communication system, determining an overlay mode for each overlay mode, receiving configuration information for all FAs from a base station over a broadcast channel, determining at least one FA index for the overlay mode, And searching for configuration information corresponding to at least one FA index using configuration information for all FAs received through the broadcast channel.

According to a second aspect of the present invention, there is provided a method of operating a base station for supporting multiple frequency assignment (FA) in a wireless communication system, overlay mode, and broadcasting configuration information for all FAs over a broadcast channel; allocating at least one FA index for the overlay mode; determining at least one FA index for the overlay mode; And searching for the configuration information corresponding to the FA index.

According to a third aspect of the present invention, there is provided a terminal operation method for supporting multiple frequency assignment (FA) in a wireless communication system, determining an overlay mode from the base station and receiving configuration information for all FAs from a base station through a broadcast channel; reporting to the base station that configuration information for the FA has been received; Receiving at least one active FA index for at least one active FA index for the overlay mode; and transmitting configuration information for all FAs received through the broadcast channel to at least one of the active FA indexes for the overlay mode And searching for the document by using the document.

According to a fourth aspect of the present invention, there is provided a method of operating a base station for supporting multiple frequency assignment (FA) in a wireless communication system, overlay mode and broadcast configuration information for all FAs through a broadcast channel; receiving notification that configuration information about the FA has been received from the corresponding terminal; Mode; and searching for at least one configuration information corresponding to at least one active FA index for the overlay mode.

According to a fifth aspect of the present invention, there is provided an operation method for supporting multiple frequency assignment (FA) in a wireless communication system, the method comprising the steps of: determining at least one FA index for the overlay mode, searching configuration information corresponding to at least one FA index for the overlay mode using a FA configuration information table, And a control unit.

According to a sixth aspect of the present invention, there is provided a wireless communication system for supporting multiple frequency allocation (FA) in a wireless communication system, determining at least one FA index for the overlay mode, determining at least one FA index for the overlay mode, determining at least one FA index for the overlay mode, receiving configuration information for all FAs from the base station over a broadcast channel, Determining a configuration mode for all FAs received through the broadcast channel, determining an overlay mode during a network entry procedure, configuring all FAs over a broadcast channel, Broadcast configuration information, and for at least < RTI ID = 0.0 > Assign more than FA index, and characterized by including a base station to retrieve configuration information corresponding to the at least one FA Index for the overlay mode.

According to a seventh aspect of the present invention, there is provided a terminal operation method for supporting multi-frequency assignment (FA) in a wireless communication system, the method comprising: in an overlay mode, Receiving a second control message including index information of at least one FA allocated for an overlay mode from the base station; and transmitting, from the base station, And searching configuration information on FAs corresponding to the indexes of at least one or more allocated FAs.

According to an eighth aspect of the present invention, there is provided a terminal operation method for supporting multi-frequency assignment (FA) in a wireless communication system, the method comprising: in an overlay mode, Transmitting a second control message including index information of at least one allocated FA for the overlay mode from the base station to the base station when the overlay mode is supported, Receiving a third control message including index information of at least one FA allocated for an overlay mode from the base station, and transmitting a third control message including an FA corresponding to an index of at least one allocated FA for the overlay mode from the base station, And searching for the configuration information .

According to a ninth aspect of the present invention, there is provided a method of operating a base station for supporting multiple frequency assignment (FA) in a wireless communication system, Selecting at least one FA for an overlay mode based on the second control message, and transmitting a second control message including index information of the selected FA to the FA And transmitting the data to the terminal.

According to a tenth aspect of the present invention, there is provided a method of operating a base station for supporting multiple frequency assignment (FA) in a wireless communication system, the method comprising: in an overlay mode, Receiving from the terminal a first control message indicating whether or not to support the first control message from the terminal, and when the overlay mode is supported, receiving a second control message including index information of at least one FA allocated for the overlay mode from the base station Selecting at least one FA for an overlay mode based on the second control message and transmitting a third control message including index information of the selected FA to the terminal .

As described above, in the wireless communication system, the base station transmits the respective configuration information for all the FAs through the broadcast channel and transmits only the corresponding FA index in the overlay mode support negotiation procedure, thereby efficiently transmitting and receiving the large capacity data There is an advantage to be able to.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a method and apparatus for processing configuration information for a plurality of operating frequencies (FAs) supporting an overlay mode in a wireless communication system Will be described.

Hereinafter, a mode in which a mobile station and a base station transmit / receive signals using a plurality of FAs will be referred to as an "overlay mode" in the following description of embodiments of the present invention. The wireless communication system operating in the overlay mode will be referred to as an "overlay communication system ".

2 is a functional block diagram of a terminal for supporting an overlay mode in a wireless communication system according to an embodiment of the present invention.

2, the UE includes a control unit 200, a first MAC processing unit 202-1 to an nth MAC processing unit 202-n, a first transmission / reception modem 204-1 to an nth transmission / A receiving modem 204-n, a multiplexer / demultiplexer 206, and an RF transmitting / receiving unit 208.

The controller 200 controls the overall operation of the terminal. That is, the controller 200 controls the overlay mode setting using the FA index for the overlay determined in the network entry procedure and the configuration information for all FAs obtained through the broadcast channel. In other words, the configuration information corresponding to the FA index for the determined overlay is determined from the configuration information of all the FAs acquired through the broadcast channel, and the overlay mode is set by using the configuration information. The control unit 200 controls generation and transmission of various control signals (preamble, FCH, MAP, etc.) and controls data transmission and reception procedures. The control unit 200 controls the first MAC processing unit 202-1 to the nth MAC processing unit 202-n to process transmission data from an upper layer (e.g., IP layer) And transfers the MAC layer data from the processing unit to the upper layer.

The first MAC processing unit 202-1 performs MAC layer processing on transmission data from an upper layer (for example, an IP layer) under the control of the controller 200 and transmits the MAC layer processing to the first transmission / reception modem 204-1. In addition, the first MAC processing unit 202-1 performs a function of generating and analyzing a control message required for signaling. For example, the first MAC processor 202-1 generates preparation indicator information for an FA for an overlay mode under the control of the controller 200. For example, According to the second embodiment, the first MAC processor 202-1 receives configuration information for all FAs, generates an ACK message according to the configuration information, and generates preparation indicator information for the active FA.

The first MAC processing unit 202-1 performs MAC layer processing on data from the first transmission / reception modem 204-1 under the control of the controller 200, and transfers the processed data to an upper layer. In addition, the first MAC processor 202-1 analyzes a control message including information on a FA for the overlay mode and a broadcast message including configuration information on all FAs received from the base station, and provides the control message to the controller 200 do. According to the second embodiment, the control unit 200 analyzes the indication message of the active FA from the base station and provides the same to the control unit 200.

The first transmission / reception modem 204-1 performs physical layer encoding of data (burst data) from the first MAC processing unit 202-1 under the control of the controller 200 in a transmission mode. The first transmission / reception modem 204-1 decodes a signal from the demultiplexer 206 in a physical layer during a reception mode.

For example, the first transmission / reception modem 204-1 includes a channel coding block, a modulation block, and the like, and modulates and outputs a signal from the first MAC processing unit 202-1. Here, the channel code block is composed of a channel encoder, an interleaver and a modulator, and the modulation block includes an Inverse Fast Fourier Transform (IFFT) for loading transmission data on a plurality of orthogonal subcarriers, And a calculator. Assuming an OFDMA system, the first transmission / reception modem 204-1 includes an FFT calculator for extracting data contained in each subcarrier, and the channel decoding block includes a demodulator (demodulator) A deinterleaver, a channel decoder, and the like.

The first MAC processing unit 202-1 and the first transmission / reception modem 204-1 are configured to perform communication according to FA1 and operate under the control of the controller 200. [ The n-th MAC processing unit 202-n and the n-th transmitting / receiving modem 204-n are configured to perform communication according to the FA_n, and operate under the control of the controller 200. [ The number of FAs used in the overlay mode is determined by the controller 200.

The multiplexer 206 multiplexes the signal from the first transmission modem 204-1 or the signal from the nth transmission modem 204-n and outputs the multiplexed signal. The demultiplexer 206 transmits the signal from the RF receiver 208 to the first transmission / reception modem 204-1 through the nth transmission / reception modem 204-2 under the control of the upper control unit 200 at the same time Or outputs the selected one or a part of the first transmission / reception modem 204-1 to the nth transmission / reception modem 204-2.

The RF transmitter 208 converts the signal from the multiplexer 206 into a signal of an actually transmittable RF band and transmits the signal through an antenna. The RF receiving unit 208 converts the signal received through the antenna into a baseband signal and outputs the baseband signal.

Since the physical layer encoding methods performed by the first transmission / reception modem 204-1 through the nth transmission / reception modem 204-n are similar, the first transmission / reception modem 204- 1) to the second transmission / reception modem 204-2 may be implemented as a single device.

3 is a functional block diagram of a base station for supporting an overlay mode in a wireless communication system according to an embodiment of the present invention.

3, the base station includes an RF transmission / reception unit 300, a multiplexer / demultiplexer 302, a first transmission / reception modem 304-1 to an nth transmission / reception modem 304-n, A first MAC processing unit 306-1 to an n-th MAC processing unit 306-n, and a control unit 308. [

The controller 300 controls the overall operation of the base station. That is, the controller 300 determines an FA for the overlay mode and controls the overlay mode operation in the network entry procedure. The control unit 300 controls the first to nth MAC processing units to process transmission data from an upper layer (e.g., IP layer), or to transmit MAC layer data from the first to n < th & As shown in FIG.

Also, the controller 300 determines an overlay mode during the network entry procedure and allocates at least one FA index for the overlay mode. And broadcasts configuration information for all FAs through a broadcast channel.

The first MAC processing unit 306-1 performs MAC layer processing on transmission data from an upper layer (for example, an IP layer) under the control of the controller 300 and transmits the MAC layer processing to the first transmission / reception modem 304-1 . In addition, the first MAC processing unit 306-1 performs a function of generating and analyzing a control message required for signaling. For example, the first MAC processor 306-1 analyzes the preparation indicator message for the overlay mode and the preparation indicator message for the active FA, which are determined under the control of the controller 308, and transmits the prepared indicator message to the controller 308 to provide. Then, the control unit 308 analyzes the ACK message for all the FA configuration information and provides the analyzed ACK message to the control unit 308.

The first MAC processing unit 306-1 processes the data from the first transmission / reception modem 304-1 under the control of the controller 300, and transfers the processed data to the upper layer. In addition, the first MAC processor 306-1 analyzes an ACK message for a preparation indicator message and all FA configuration information received from the terminal, and provides the controller 308 with the analyzed ACK message.

The first transmission / reception modem 304-1 performs physical layer encoding of data (burst data) from the first MAC processing unit 306-1 under the control of the control unit 308 in a transmission mode. The first transmission / reception modem 304-1 decodes the signal from the demultiplexer 302 during the physical layer decoding and outputs the decoded signal.

For example, the first transmission / reception modem 304-1 includes a channel code block, a modulation block, and the like, and modulates and outputs a signal from the first MAC processor 306-1. Here, the channel code block is composed of a channel encoder, an interleaver and a modulator, and the modulation block includes an Inverse Fast Fourier Transform (IFFT) for loading transmission data on a plurality of orthogonal subcarriers, And a calculator. Assuming an OFDMA system, the first transmission / reception modem 304-1 includes an FFT calculator for extracting data on each subcarrier, and the channel decoding block includes a demodulator (demodulator) A deinterleaver, a channel decoder, and the like.

The first MAC processing unit 306-1 and the first transmission / reception modem 304-1 are configured to perform communication according to FA1 and are operated under the control of the control unit 308. [ The n-th MAC processing unit 306-n and the n-th transmitting / receiving modem 304-n are configured to perform communication according to FA_n, and operate under the control of the controller 308. The number of FAs used in the overlay mode is determined by the controller 200.

The multiplexer 302 multiplexes the signal from the first transmission modem 304-1 and the signal from the nth transmission modem 304-n and outputs the multiplexed signal. The demultiplexer 302 transmits the signal from the RF receiver 300 to the first transmission / reception modem 304-1 through the nth transmission / reception modem 304-2 under the control of the upper control unit 308 Or outputs the selected one or a part of the first transmission / reception modem 304-1 to the nth transmission / reception modem 304-2.

The RF transmitter 300 converts a signal from the multiplexer 302 into a signal of an actually transmittable RF band and transmits the RF signal through an antenna. The RF receiving unit 300 converts a signal received through the antenna into a baseband signal and outputs the baseband signal.

Since the physical layer encoding methods performed by the first transmission / reception modem 304-1 to the nth transmission / reception modem 304-n are similar, the first transmission / reception modem 204-1 ) To the nth transmission / reception modem 304-n as a single device.

FIG. 4 is a flowchart illustrating an operation of a terminal for supporting an overlay mode in a wireless communication system according to a first embodiment of the present invention.

Before describing FIG. 4, it is assumed that the overlay communication system includes a terminal and a base station, and the base station operates at least two FAs, that is, a primary FA and at least one secondary FA .

The FA includes an FA (available FA) which is available in the base station, an FA (assigned FA) allocated in the terminal in the overlay mode, an FA (active FA) used in the actual data transmission and reception by the terminal in the overlay mode ), And the allocated FA and the actually used FA may be the same. Alternatively, the actually used FA may be a subset of the allocated FA.

Referring to FIG. 4, in step 400, the terminal searches for an FA to perform an initial network entry procedure to a base station. In other words, the center frequency of the FA is searched and synchronized.

Then, the terminal performs a network entry procedure through the FA that is searched in step 402. That is, synchronization and initial ranging procedures are performed to set power offset values, timing offset values, and the like to appropriate values.

In step 404, the terminal performs Negotiate Basic Capabilities in the course of performing a network entry procedure. For example, the MS transmits an SS Basic Capability Request (SBC-REQ) message or a REG-REQ (Registration Request) message to the BS, and transmits an SBC-RSP (SS Basic Capability Response) Registration Response) message, thereby performing the built-in capability negotiation.

During the basic capability negotiation, the UE informs the BS whether it supports the overlay mode using the SBC-REQ message or the REG-REQ message, and uses the SBC-RSP message or the REG-RSP message in the overlay mode And receives information about the FA. The information on the FA to be used in the overlay mode in the basic capability negotiation includes information on the number of FAs supported by the terminal, the overlay mode supported by the terminal, the FA index information to be used by the terminal, , Band class information, and band capability information.

The overlay mode may include whether the terminal supports FA aggregation mode, FA switching mode, whether the terminal supports the PHY segmentation mode, whether it supports the MAC segmentation mode, whether the terminal supports the FA segmentation mode, Whether or not it supports overlay mode only for non-adjacent FAs, and whether overlay mode is supported for non-adjacent FAs.

The FA index information may include a physical carrier index of the FA and a logical carrier index applied only to the terminal in the base station. At this time, the base station transmits configuration information (e.g., center frequency of FA, bandwidth of FA, offset of FA, etc.) to the FA supporting the overlay mode through the SBC-RSP message or the REG- But the size of the SBC-RSP message or the REG-RSP message increases. However, the BS may be overhead by transmitting an SBC-RSP message or a REG-RSP message to a plurality of MSs, respectively. Therefore, during the basic capability negotiation, only FA index information is received for a plurality of FAs supporting the overlay mode. In other words, configuration information for a plurality of FAs supporting the overlay mode is not received.

Accordingly, in step 406, the terminal receives configuration information on all FAs transmitted by the base station while performing the network entry procedure. The configuration information for the FA may be transmitted through a broadcast channel (or broadcast message) transmitted from the base station. The configuration information for the FA may include actual index information of the FA, a center frequency of the FA, a bandwidth of the FA, offset information of the FA, and the like. Only the center frequency, bandwidth, and offset information except for the FA index information may be included in the broadcast channel (or broadcasting message). This means that index information of the FA corresponding to the remaining FA configuration information for the FA is implicitly the FA index information may be omitted from the configuration information for the FA if the UE can recognize the FA index information implicitly. That is, the index of each FA can follow the order in which the FA configuration information of the FA is included in the broadcast channel (or broadcast message).

As described above, the terminal supporting the overlay mode through steps 404 and 406 obtains information on which FA to use in communication with the base station and configuration information on the FA to use. That is, in step 404, simple information such as index information on an FA to be used by the terminal is obtained, and detailed information on the FA can be acquired through the configuration information broadcasted by the base station in step 406. [

In the above description, the configuration information on the FA broadcasted by the base station is received in step 406 after the overlay mode support negotiation process in the basic capability negotiation process in step 404, but the configuration information acquisition for the FA in step 406 Or may occur before step 404. The UE informs the BS of an indication that it has received the configuration information message for the FA using the SBC-REQ message or the REG-REQ message exchanged during the overlay mode support negotiation procedure of the basic capability negotiation process of step 404 Lt; / RTI > In this case, when the BS receives an indicator indicating that it has not received the configuration information message for the FA, the BS uses the SBC-RSP message or the REG-RSP message to transmit index information about the FA to be used by the MS, Together with the configuration information of the FA.

According to another embodiment, when the UE and the BS store the configuration information of the FA in a table, it is not necessary to transmit configuration information for all the FAs through a broadcast message. The terminal may search the table for configuration information corresponding to the FA index supporting the overlay mode determined at the negotiation of the basic capability.

In step 408, the UE searches for configuration information corresponding to the FA index in step 404 from the configuration information on all FAs received through the broadcast message in step 406. In step 406, To perform data transmission and reception. The procedure of step 408 does not perform the network entry procedure through the FA. When the FA acquires synchronization and frequency / time / power offset adjustment to transmit / receive data using the FA, This means code-based ranging operation to be performed.

If the UE is ready to use the FA for the overlay mode in step 408, the terminal proceeds to step 410 and determines that it is ready to perform data transmission / reception with the base station using the FA for the overlay mode. Lt; / RTI > Here, the detailed description of the signal indicating that the FA is ready to perform the overlay mode is outside the scope of the present invention and will not be described here.

Thereafter, the procedure of the present invention is terminated.

5 is a flowchart illustrating an operation of a base station for supporting an overlay mode in a wireless communication system according to a first embodiment of the present invention.

Referring to FIG. 5, in step 500, the BS transmits configuration information of all FAs through a broadcast channel or a broadcast message periodically or by event triggering.

If the UE stores configuration information for all FAs in a table, the base station does not need to broadcast configuration information of all FAs through a broadcast message.

In step 502, the BS allocates a plurality of FAs to be used in the overlay mode to the AT when the AT recognizes that the AT is a terminal supporting the overlay mode during the network entry procedure with the AT. The procedure for recognizing the terminal supporting the overlay mode corresponds to the basic capability negotiation procedure of the network entry procedure and can be determined by receiving the SBC-REQ message or the REG-REQ message transmitted by the terminal. The FA assignment of the UE to be used in the overlay mode may be included in the SBC-REQ message or the REG-RSP message corresponding to the response message of the REG-REQ message. Also, the SBC-RSP message or the REG-RSP message transmitted by the base station uses the allocated FA together with the allocation information (FA index and FA number allocated to the terminal, overlay mode to be used by the terminal, etc.) And may include time information that begins to be generated.

Then, in step 504, the BS determines whether it receives a signal from the MS indicating that it is ready to perform data transmission / reception with the BS using the FA allocated in step 502. In step 504, when the BS receives a signal indicating that the overlay mode data transmission / reception is ready, the BS proceeds to step 506 to transmit / receive data to / from the MS through the allocated FA.

Thereafter, the procedure of the present invention is terminated.

4, FIG. 5 and FIG. 5, a terminal supporting an overlay mode during the network entry procedure is allocated an FA to be used by a base station, acquires detailed information on the allocated FA through configuration information, The operation of notifying that the assigned FA is ready is described. That is, the case where all the FAs allocated thereto operate as FAs actually used by the terminal and the base station for data transmission and reception has been described.

In the case where the BS separately instructs the FA to use according to the status of the allocated FAs without using all of the allocated FAs for data transmission and reception between the terminal and the base station, Will be described with reference to FIG.

FIG. 6 is a flowchart illustrating an operation of a terminal for supporting an overlay mode in a wireless communication system according to a second embodiment of the present invention.

Referring to FIG. 6, in step 600, the terminal searches through an FA for the network entry procedure and performs a network entry procedure.

Thereafter, during the network entry procedure, the terminal performs an overlay mode support negotiation procedure in step 602 to acquire FA information that can be used in the overlay mode with the base station. The FA information includes a number of FAs that the terminal can support, an overlay mode supported by the terminal, FA index information to be used by the terminal, and the like. The step 602 is the same as the step 404.

In step 604, the terminal acquires configuration information on all FAs managed by the base station through a broadcast channel or a broadcast message transmitted by the base station. The configuration information for the FA may include actual index information of the FA, a center frequency of the FA, a bandwidth of the FA, offset information of the FA, and the like. The configuration information acquisition procedure for all the FAs managed by the base station in step 604 may occur before step 602. [

In step 606, the terminal receiving the configuration information transmits a signal indicating that the configuration information is received to the base station. In step 602, the signal is transmitted to inform that the FA allocated from the BS is ready for use, and indicates an FA (i.e., an active FA) to be used by the BS from the allocated FA And transmits it to notify the user to perform the procedure.

Although the operation of acquiring the configuration information for the FA managed by the base station in step 604 has been described above, the configuration information acquisition for the FA managed by the base station may be performed before step 602. [ Accordingly, the terminal transmits an indicator indicating that the configuration information for the FA has been acquired using the SBC-REQ message or the REG-REQ message transmitted in the overlay mode support negotiation procedure of step 602. [ In the case of transmitting an indicator informing that the configuration information for the FA has been acquired in the SBC-REQ message or the REG-REQ message, operation 606 may not be performed.

If it is not possible to acquire the configuration information for the FA during the overlay mode support negotiation procedure of step 602, the indicator is transmitted using the SBC-REQ message or the REG-REQ message. When receiving an indicator informing that the configuration information for the FA has not been acquired, the base station transmits the configuration information of the FA along with the index information of the FA to be used by the terminal through the SBC-RSP message or the REG-RSP message . If the configuration information of the FA to be used is included in the SBC-RSP message or the REG-RSP message, operation 604 may not be performed.

In step 608, the terminal receives an allocation instruction for an FA (hereinafter referred to as active FA) to be actually used in the overlay mode from the base station. The FA allocation indication received in step 608 may include the index information of the FA, the virtual index information of the FA, and the usage start time information of the FA.

In step 610, the terminal performs a procedure for preparing to transmit / receive data using information (e.g., FA index information) about the active FA received in step 610. [ The procedure for preparing for data transmission / reception may include ranging.

When the mobile station is ready to transmit and receive data using the active FA indicated in step 612, the mobile station transmits a signal for informing the base station. The signal transmitted in step 612 is the same as the signal transmitted in step 410.

7 is a flowchart illustrating an operation of a base station for supporting an overlay mode in a wireless communication system according to a second embodiment of the present invention.

Referring to FIG. 7, in step 700, the BS transmits configuration information of an FA managed by the BS through a broadcast message or a broadcast channel. In step 702, the BS allocates an FA that can be used by the UE in the overlay mode while performing a network entry procedure with the UE in the overlay mode. The information exchanged between the UE and the BS in step 702 includes the number of FAs that the UE can support, the overlay mode of the UE, and FA index information that the UE can use.

In step 704, the BS confirms whether it receives a signal indicating that it has received the configuration information transmitted in step 700 from the MS. In step 704, a signal indicating whether configuration information is received for the FA received from the terminal is included in the message transmitted by the terminal in step 702 or transmitted using a message separate from the message of step 702 . If it is determined in step 702 that an indication to the effect that the configuration information on the FA has not been received is included in the message received from the terminal, the BS transmits an FA to the terminal using the message transmitted to the terminal in step 702 Lt; / RTI >

In step 704, the BS receives the signal indicating that it has received the configuration information from the MS. In step 706, the MS transmits information about the active FA (e.g., FA index) in the overlay mode. In step 706, the message transmitted to the mobile station may include information on the start time of use of the active FA in addition to the index of the active FA.

In step 708, the BS confirms whether it receives a signal from the MS in step 706 to inform that it is ready to use the active FA. In step 708, when a signal indicating that the mobile station is ready to transmit / receive data through the active FA is received, the base station transmits / receives data to / from the mobile station through the FA in step 710.

Meanwhile, in step 706, the active FA information transmitted from the BS to the mobile station may be the same as the FA allocated in step 702, but a new FA not allocated in step 702 may be included in the active FA information. The new FA configuration information that is not allocated in step 702 can be acquired through the FA configuration information transmitted by the base station in step 700. [ Alternatively, in step 706, the base station may transmit the configuration information on the new FA together with the index for the new active FA to the message transmitted to the terminal.

FIG. 8 shows a flowchart for supporting the overlay mode in the wireless communication system according to the first embodiment of the present invention.

Referring to FIG. 8, the base station transmits configuration information for all FAs through event triggering or periodically broadcast channel (800).

The terminal and the base station perform negotiation for overlay mode during the network entry procedure and determine an FA index for the overlay mode when the overlay mode is determined (810).

In steps 800 and 810, the UE may receive the FA index for the overlay mode before receiving the configuration information for all FAs.

After receiving the FA index for the overlay mode and the corresponding configuration information, the terminal determines FA configuration information corresponding to the FA index supporting the overlay mode (820), and transmits a preparation indicator message for the determined overlay mode To the base station (830).

Thereafter, the terminal transmits and receives data to and from the terminal and the base station using the determined FA (840).

9 is a flowchart for supporting an overlay mode in a wireless communication system according to a second embodiment of the present invention.

Referring to FIG. 9, the base station transmits configuration information on all FAs through event triggering or periodically broadcasting on a broadcast channel (900).

In addition, the UE and the BS perform negotiation for the overlay mode during the network entry procedure, and determine the FA index for the overlay mode when the overlay mode is determined (910).

Steps 900 and 910 are independent processes, and the UE may receive an FA index for overlay mode before receiving configuration information for all FAs.

Upon receiving the configuration information for all FAs from the BS, the MS transmits an ACK message to the BS in step 920.

Upon receiving the ACK message, the BS transmits an indication message to an active FA (step 930), determines a FA configuration information corresponding to the active FA index (step 940) To the base station (950).

Thereafter, the terminal transmits and receives data to and from the terminal and the base station using the determined active FA (960).

FIG. 10 shows a flowchart for supporting an overlay mode in a wireless communication system according to a third embodiment of the present invention.

Referring to FIG. 10, in step 1000, the BS transmits configuration information for all FAs through event triggering or periodically through a broadcast channel.

In step 1010, the terminal searches for an FA that can perform the network entry procedure, and performs a network entry procedure with the base station through the FA in step 1020. [ In step 1030, the terminal transmits a message including overlay mode support information during the basic capability negotiation step in the network entry procedure. The message of step 1030 includes an overlay mode supported by the terminal. In addition, the UE may include indicator information indicating whether configuration information on a plurality of FAs broadcast by the base station has been received in step 1000.

In step 1040, if the UE receives the configuration information on the FA transmitted from the base station in step 1000, the terminal selects an available FA among the FAs included in the FA configuration information according to the terminal support capability and the requirements of the terminal, To the base station. The message transmitted in step 1040 includes index information of the FA selected by the terminal.

In step 1050, the base station selects an FA to be allocated to the terminal based on the overlay support capability information received in steps 1030 and 1040, the FA information available to the terminal, and the FA status of the base station, To the terminal. The message transmitted in step 1050 includes index information of FAs allocated to the AT and starting time information on the FAs.

The message transmitted in steps 1040 and 1050 corresponds to a message transmitted between the UE and the BS in the basic capability negotiation procedure of step 1030 or a separate message. If the messages in steps 1040 and 1050 are separate messages, the procedure after step 1040 is performed after the BS and the inter-UE network entry procedure are completed.

The terminal having received the FA information allocated by the base station transmits to the base station a signal indicating that it is ready to transmit and receive data using the FA in step 1060. In step 1070, Data is transmitted and received.

FIG. 11 is a flowchart for supporting an overlay mode in a wireless communication system according to the fourth embodiment of the present invention.

Referring to FIG. 11, in step 1100, the BS transmits configuration information for all FAs through event triggering or periodically through a broadcast channel.

In step 1110, the terminal searches for an FA capable of performing a network entry procedure, and performs a network entry procedure with the base station through the FA in step 1120. [ In step 1130, the terminal transmits a message including overlay mode support information during the basic capability negotiation step of the network entry procedure. The message in step 1130 includes detailed overlay mode support information, such as an overlay mode supported by the AT, capacity information supported by the AT, interval between FAs supported by the AT, and FA number information supported by the AT. In addition, the UE may include indicator information indicating whether the UE has received the configuration information on the FA transmitted by the base station in step 1100.

After completing the network entry procedure between the subscriber station and the base station, the base station selects an FA to be allocated to the subscriber station based on the overlay capability information received in step 1130 and the FA status of the base station, and transmits the selected FA to the subscriber station ). The message transmitted in step 1140 includes index information of FAs allocated to the AT and starting time information of using the assigned FA. In addition, the message transmitted in step 1140 may include configuration information for the FA assigned.

Upon receiving the FA information allocated by the BS, the MS transmits to the BS a signal indicating that it is ready to transmit and receive data using the FA in step 1150. In step 1160, Data is transmitted and received.

FIG. 12 shows a flowchart for supporting an overlay mode in a wireless communication system according to a fifth embodiment of the present invention.

Referring to FIG. 12, in step 1200, the BS transmits configuration information for all FAs through event triggering or periodically through a broadcast channel.

In step 1210, the terminal searches for an FA capable of performing a network entry procedure, and performs a network entry procedure with the base station through the FA found in step 1220. [ In step 1230, the terminal transmits a message including overlay mode support information during the basic capability negotiation step of the network entry procedure. The overlay mode support information in step 1230 includes information on whether the terminal supports the overlay mode.

After completing the network entry procedure, the terminal transmits a message including additional overlay mode support capability information to the base station in step 1240. The message of step 1240 includes detailed overlay mode support information such as the overlay mode supported by the terminal, the capability information supported by the terminal, the interval between FAs supported by the terminal, and the number of FAs supported by the terminal. In addition, the UE may include indicator information indicating whether or not the UE has received the configuration information for FAs transmitted by the base station in step 1200.

In step 1250, the BS selects an FA to be allocated to the MS based on the overlay capability information received in step 1240 and the FA status of the BS, and transmits a message including the FA information to the MS in step 1250. The message transmitted in step 1250 includes index information of FAs allocated to the AT and start time information on the FAs. In addition, the message transmitted in step 1250 may include configuration information on the FA assigned.

The terminal having received the FA information allocated by the base station transmits to the base station a signal indicating that it is ready to transmit and receive data using the FA in step 1260. In step 1270, Data is transmitted and received.

FIG. 13 shows a flowchart for supporting an overlay mode in a wireless communication system according to a sixth embodiment of the present invention.

Referring to FIG. 13, in step 1300, the BS transmits configuration information for all FAs through event triggering or periodically through a broadcast channel.

In step 1310, the terminal searches for an FA capable of performing a network entry procedure, and performs a network entry procedure with the base station through the FA found in step 1320. [ In step 1330, the terminal transmits a message including overlay mode support information during the basic capability negotiation in the network entry procedure. The message in step 1330 includes an overlay mode supported by the AT, capacity information supported by the AT, interval between FAs supported by the AT, and number of FAs supported by the AT. In step 1330, the terminal and the base station perform a negotiation procedure as to whether to use the overlay mode by including the overlay mode support information of the terminal.

If it is determined in step 1340 that the overlay mode is to be used, the terminal transmits a message indicating whether configuration information on a plurality of FAs transmitted by the base station has been received in step 1340. The message in step 1340 includes FA configuration information reception indicator information, and may be a signal to be piggybacked on a MAC layer control message, a MAC layer header, or another message.

In step 1340, after receiving a message indicating that the FA configuration information has been received from the terminal, the base station allocates the FA configuration information to the terminal based on the overlay capability information received in step 1330 and the FA status of the base station FA and transmits a message including the FA information to the terminal. The message transmitted in step 1350 includes index information of the FA allocated to the terminal and starting time information on the FA used.

In step 1360, the terminal receiving the FA information allocated by the base station transmits to the base station a signal indicating that it is ready to transmit / receive data using the FA, and in step 1370, Data is transmitted and received.

In FIGS. 10, 11, 12 and 13, it is assumed that the FA allocated by the BS is used for data transmission / reception between the BS and the UE while the UE is performing the overlay mode operation. If the BS separately instructs the FA to use according to the status of the allocated FA, steps 930 to 950 of FIG. 9 may be additionally performed between the BS and the MS.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

FIG. 1 schematically illustrates a structure supporting a single frequency band and a structure supporting two frequency bands in a conventional wireless communication system,

2 is a functional block diagram of a terminal for supporting an overlay mode in a wireless communication system according to an embodiment of the present invention;

3 is a functional block diagram of a base station for supporting an overlay mode in a wireless communication system according to an embodiment of the present invention;

4 is a flowchart illustrating an operation of a terminal for supporting an overlay mode in a wireless communication system according to a first embodiment of the present invention.

5 is a flowchart illustrating an operation of a base station for supporting an overlay mode in a wireless communication system according to a first embodiment of the present invention.

6 is a flowchart illustrating an operation of a terminal for supporting an overlay mode in a wireless communication system according to a second embodiment of the present invention.

7 is a flowchart illustrating an operation of a base station for supporting an overlay mode in a wireless communication system according to a second embodiment of the present invention.

8 is a flowchart for supporting an overlay mode in a wireless communication system according to the first embodiment of the present invention;

9 is a flowchart for supporting an overlay mode in a wireless communication system according to a second embodiment of the present invention;

10 is a flowchart for supporting an overlay mode in a wireless communication system according to a third embodiment of the present invention.

11 is a flowchart for supporting an overlay mode in a wireless communication system according to a fourth embodiment of the present invention;

12 is a flowchart for supporting an overlay mode in a wireless communication system according to a fifth embodiment of the present invention,

13 is a flowchart for supporting an overlay mode in a wireless communication system according to a sixth embodiment of the present invention.

Claims (54)

A method of operating a terminal in a wireless communication system, Comprising: receiving, from a base station, a first message including information on a plurality of carriers capable of supporting the terminal; Generating a second message including carrier information on at least one carrier combination supported by the terminal among the plurality of carriers; And transmitting the second message to the base station indicating the at least one carrier combination determined by the terminal, Wherein the at least one carrier combination is determined by the terminal based on an order of information about the plurality of carriers in the first message. 2. The method of claim 1, wherein the second message comprises information indicating a capability of the terminal. 2. The method of claim 1, wherein the at least one carrier combination indicates carriers capable of supporting concurrently. The method of claim 1, further comprising: receiving allocation information for the at least one carrier combination from the base station; And receiving data via the at least one carrier combination. The method of claim 1, wherein the first message comprises at least one of an index of the plurality of carriers, a center frequency of the plurality of carriers, a bandwidth of the plurality of carriers, and offset information of the plurality of carriers. A method of operating a base station in a wireless communication system, Transmitting a first message including information on a plurality of carriers that can be supported to a terminal to a terminal; Receiving, from the terminal, a second message indicating at least one carrier combination determined by the terminal, Wherein the second message comprises carrier information about the at least one carrier combination supported by the terminal among the plurality of carriers, Wherein the at least one carrier combination is determined by the terminal based on an order of information about the plurality of carriers in the first message. 7. The method of claim 6, wherein the second message comprises a message indicating a capability of the terminal. 7. The method of claim 6, wherein the at least one carrier combination indicates carriers capable of supporting concurrently. 7. The method of claim 6, wherein the first message comprises at least one of an index of the plurality of carriers, a center frequency of the plurality of carriers, a bandwidth of the plurality of carriers, and offset information of the plurality of carriers. The method of claim 6, further comprising: transmitting allocation information for the at least one carrier combination; And transmitting data via the at least one carrier combination. A terminal apparatus in a wireless communication system, Comprising: a transmission / reception unit for receiving, from a base station, a first message including information on a plurality of carriers capable of supporting the terminal; And a controller for generating a second message including carrier information about at least one carrier combination supported by the terminal among the plurality of carriers, Wherein the transceiver transmits to the base station the second message indicating the at least one carrier combination determined by the terminal, Wherein the at least one carrier combination is determined by the terminal based on an order of information about the plurality of carriers in the first message. 12. The apparatus of claim 11, wherein the second message comprises information indicating a capability of the terminal. 12. The apparatus of claim 11, wherein the at least one carrier combination indicates carriers capable of being simultaneously supported by the terminal. 12. The apparatus of claim 11, wherein the transceiver receives allocation information for the at least one carrier combination from the base station, and receives data via the at least one carrier combination. 12. The apparatus of claim 11, wherein the first message comprises at least one of an index of the plurality of carriers, a center frequency of the plurality of carriers, a bandwidth of the plurality of carriers, and offset information of the plurality of carriers. A base station apparatus in a wireless communication system, And a transmitting and receiving unit for transmitting a first message including information on a plurality of carriers that can be supported by the terminal to the terminal and receiving a second message from the terminal indicating at least one carrier combination determined by the terminal and, Wherein the second message comprises carrier information about the at least one carrier combination supported by the terminal among the plurality of carriers, Wherein the at least one carrier combination is determined by the terminal based on an order of information about the plurality of carriers in the first message. 17. The apparatus of claim 16, wherein the second message comprises a message indicating a capability of the terminal. 17. The apparatus of claim 16, wherein the at least one carrier combination indicates carriers capable of being simultaneously supported by the terminal. 17. The apparatus of claim 16, wherein the first message comprises at least one of an index of the plurality of carriers, a center frequency of the plurality of carriers, a bandwidth of the plurality of carriers, and offset information of the plurality of carriers. 17. The apparatus of claim 16, wherein the transceiver transmits allocation information for the at least one carrier combination and transmits data via the at least one carrier combination. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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